WO2002061903A1

WO2002061903A1 - Marine medium high voltage switchboard plant

Info

Publication number: WO2002061903A1
Application number: PCT/DE2002/000293
Authority: WO
Inventors: Uwe Hegmann; Norbert Herbst; Bernd Kallbach; Jürgen VOLLMERDING
Original assignee: Siemens Aktiengesellschaft
Priority date: 2001-02-01
Filing date: 2002-01-28
Publication date: 2002-08-08
Also published as: CA2437106A1; EP1356560A1; DE10104890A1; US20040100757A1

Abstract

The invention relates to a medium high voltage switchboard plant for ships, trains, train power supply systems, etc., that is composed of a plurality of switch cabinets, the individual switch cabinets having low voltage fields with automatic electrical control devices and medium high voltage fields with power switches.

Description

description

Ship Mittelspannungsschaltanläge

The invention relates to a medium-voltage switchgear for ships, trains, traction power supply, etc., which is composed of individual control cabinets.

Special quality requirements apply to the medium-voltage switchgear of ships, trains, traction power supply, etc. are laid down in the regulations of the classification societies. It is an object of the invention to provide, in the context of the regulations given by the classification societies, etc., a particularly inexpensive and safe medium-voltage switchgear which is easy to use and occupies only a small space.

The task is solved in that the individual control cabinets have low-voltage fields with regulating and control devices and medium-voltage fields with circuit breakers. Further features of the solution emerge from the subclaims and from the drawings, which in the person skilled in the art readily show further inventive features. The drawings show the view of a switchgear as well as individual fields in sectional representation in consecutively numbered form.

The medium-voltage switchgear 1 is a distribution for medium-voltage networks on ships. It is essentially made up of generator and consumer fields.

regulations

Construction and electrical equipment according to the relevant regulations. The 3AH vacuum switches and 3TL vacuum contactors used specifically in this Appendix 1 are from the classification societies Bureau Veritas, Germani- scher Lloyd, Lloyds Register of Shipping and Register of the USSR approved.

Mechanical construction and construction

Switchgear 1 consists of free-standing fields, some of them in scaffolding (sheet steel 2.5 mm welded). In order to limit the effects of an arcing fault, individual rooms are sealed off with pressure relief flaps.

Switchgear 1 is suitable for wall installation while maintaining an assembly and blow-out space of 500 mm behind the panels. To protect the operating personnel, all pressure relief flaps are arranged backwards.

The circuit breaker 2 or the device combinations for consumer outlets run on rails 3 and can be pulled out to the front, an electromechanical locking mechanism ensuring that the branch is switched off before the pull-out. A test position is available. A spindle drive serves to facilitate the retraction and extension.

The low voltage parts 4 in the generator and in the

Consumer fields is separated from the medium-voltage part 5 and is sealed off on all sides.

generator field

Module with 3 3AH circuit breaker (vacuum switch), 3 voltage transformers, 3 current transformers, earthing switch.

Generator protection, PMA71, mechanical controls are provided in the front panel 6 of the slide-in module. Similar arrangement for larger motor branches, transformer outlets, coupling fields, etc.

Consumer field 4

Module with 3AH circuit breaker (vacuum switch), 3 current transformers, earthing switch in the consumer fields. The inserts themselves are partitioned against each other (arc-proof). Mechanical controls are provided in the front panel of the drawer.

Dome field 5

Insert with 3AH circuit breaker (vacuum switch), 3 current transformers, earthing switch, synchronization. In the dome fields, inserts are also partitioned against each other (arc-proof). Mechanical controls are provided in the front panel of the drawer.

ground fault

In the case of isolated or high-resistance grounded networks, an earth fault protection monitoring with direction detection and central message is available.

High-resistance grounded networks can be expanded to provide selective earth fault protection with automatic shutdown. For this purpose, a cable conversion transformer is available in each selectively monitored branch and an earth resistance field is possible for each generator.

Overcurrent and short-circuit protection

The devices required for the control and monitoring of the medium voltage feeders are housed in the respective low-voltage room of the field. The instruments and controls are arranged in the front. Generator field 7

- differential protection

- Short-time delayed short-circuit protection - Overcurrent protection reverse power protection

- synchronization devices

- Delayed undervoltage relay

- Earth fault monitoring

Load field 4 with circuit breaker

- Short-delayed short-circuit protection

- Overcurrent protection

- Earth fault monitoring

Section switch panel 5

- Short-time delayed short-circuit protection

- Overcurrent protection, synchronization devices - Earth fault monitoring

- Voltage and frequency monitoring

Claims

claims

1. Medium-voltage switchgear for ships, trains, railway power supplies, etc., which is composed of individual control cabinets, characterized in that the individual control cabinets have low-voltage fields with regulating and control devices and medium-voltage fields with circuit breakers.

2. Medium-voltage switchgear according to claim 1, characterized in that it has generator fields, consumer fields and tie switch fields.

3. Medium voltage switchgear according to claim 1 or 2, characterized in that its protective function devices are integrated in the low-voltage fields.

4. Medium-voltage switchgear according to one or more of the preceding claims, characterized in that it has programmable logic controllers (programmable controllers) in the low-voltage fields, preferably of the type SIMATIC S-7.

5. Medium-voltage switchgear according to one or more of the preceding claims, characterized in that it has differential protection devices, short-time delaying short-circuit devices, overcurrent protection devices, reverse power protection devices, synchronizing devices, a delayed undervoltage relay and earth fault monitoring devices for the generator fields.

6. Medium-voltage switchgear according to one or more of the preceding claims, characterized in that it has a short-delayed short-circuit protection device, an overcurrent protection device and an earth fault monitoring device for the consumer fields.

7. Medium-voltage switchgear according to one or more of the preceding claims, characterized in that it has short-time delayed short-circuit protection devices, overcurrent protection devices, synchronizing devices, earth fault monitoring devices and voltage and frequency monitoring devices for the coupling switch fields.

8. Medium-voltage switchgear according to one or more of the preceding claims, characterized in that it is at least partially designed without a scaffold, wherein in the scaffoldless design, the individual cabinet panels have tongue-pass hole connections which are welded to achieve the necessary stability.

9. Medium-voltage switchgear according to one or more of the preceding claims, characterized in that it has circuit breakers which can be pulled out on rails and are equipped with electromechanical shut-off interlocks.

10. Medium voltage switchgear according to one or more of the preceding claims, characterized in that bulkheads are arranged in connection with the coupling switch panels.

11. Medium voltage switchgear according to one or more of the preceding claims, characterized in that it has pressure relief flaps and blow-out spaces.